Cloth cutter



March 26, 1929. T. E. LANGSTON CLOTH CUTTER Filed June '7, 1927 I N VENTOR.

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patented Mar. 26, 1929.

UNITED STATES THOMAS E. LANGS TON, OF FRANKLINTON, NORTH CAROLINA.

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Application filed June 7, 1927. Serial No. 197,085.

This invention relates tocloth cutters of that type wherein a rotatableknife is mounted within a casing and driven by a motor.

The general object of the present lnvention is to provide a very simple,eas1ly handled and easily operated construction of this character andone in which the knife is driven by means ofa blast of air acting uponthe turbine or like air motor.

My inventionis illustrated 1n the accompanying drawing, wherein Figure 1is a side elevation of a cloth cutter constructed in. accordance with myinvention Figure 2 is a section on the line 22 of Figure 1;

Figure 8 is a section on the line 33 of Figure 2.

Referring to this drawing, 10 designates a motor casing closed at oneend by the end plate 11 and at the other end by the end plate 12. Themotor casing is formed with flanges and the end plates are held. tothese flanges by the bolts 13.

Disposed within the casing is a motor 14% having a shaft or trunnion 15,one end of this shaft or trunnion operating within a bearing 16 havingmeans whereby it may be lubricated, the other end of the shaft ortrunnion operating in suitable bearings and being reduced, as at 17. Therotor consists of a barrel having the transversely extending pockets 18defined by the blades 19, these blades extending approximatelytangential to the circle defined. by the rotor. Opening into the casingor housing 10 is a tapered blast pipe 20 which discharges against theblades and is provided with the controlling alve 21 of any suitableconstruction. This blast pipe 20 is adapted to be'connected to anysuitable source of air under compression. This blast pipe 20, it will beseen, constitutes a handle extending rearward from the motor housing inoff-set relation to the finger Extending from the housing 10 on one sidethereof are the angular spacing members 22 or brackets which support theknife housing 23. The shaft or trunnion of the motor 17 passes throughthis housing and carries the nut 24-. The housing is formed with thetangentially extending finger 25 and inward of this finger the housingis cut awayyas at 26, so as to expose the saw. This finger has a smoothupper surface from the extremity of the finger nearly to the knife sothat the finger may be inserted beneath several layers of cloth withoutinjuring the cloth, the finger at its intersection with the knife givinga point of support to the cloth on. each side of the knife, and isadapted to be inserted beneath the cloth to be cut and then the cutterpushed along until the cloth is brought into contact with the rapidlyrotating knife or cutter 27. The housing 23 is provided with an airdischarge port 28 through which the air passes after it has acted uponthe motor.

The use of this device will be obvious from what has gone before. Itwill be seen that this cutter is extremely simple, that it may bereadily taken apart for repair or replacement, that it is light,portable and particularly effective. I do not wish to be limited to theexact form of the rotor, though in actual practice I find this form tobe of particular value. Any desired source of air may be used. The partsare preferably made of aluminum and the rotor will be supported in ballbearings. The weight is about fourteen ounces and the motor will operatewith about twenty-five pounds compression.

I claim 1. A cloth cutter of the character described including a motorhousing, a knife housing disposed laterally of and coaxially with themotor housing and. having an elongated finger and being cut away at thebase of this finger, a blast pipe constituting a handle en.- tering thehousing tangentially in off-set relation to the finger and connected toa source of compressed air, a circular knife disposed within the knifehousing, a motor within the motor housing having a shaft extending intothe knife housing and upon, which the circular knife is mounted, theouter wall of the knife housing being cut away at its center to exposethe end of the shaft, and a nut engaging the end of the shaft andholding the knife in place upon the shaft, the motor including a rotorhaving a plurality of transversely extending pockets defined by blades,approximately tangential to a circle concentric to the axial center ofthe rotor, against which blades the blast of air is projected.

2. A cloth cutter of the character described. including a motor housing,a circular knife housing disposed laterally of the motor hous ing andhaving an elongated finger, the knife housing being circular in generalform and having an outside and inside wall, the motor housing being cutaway at its junction with thefinger to expose the knife, a blast pipeconstituting a handle and entering the handle tangentially, and adaptedto be connected to a source of compressed air, a circular knife disposedwithin the knife housing and operating between the outerand inner wallsof the knife housing and finger, and a motor within the motor housinhaving a shaft extending through the knife housing and upon which theknife is mounted, the motor including a. rotor having a plurality oftransversely extending pockets defined by transversely extending blades.

In testimony whereof I hereunto affix my signature THOMAS E. LANGSTON.

